1923 In Paleontology
Arthropoda newly named insects Archosauromorpha Newly named dinosaurs Data courtesy of George Olshevsky's dinosaur genera list. Pterosaurs New taxa Synapsids Non-mammalian References {{portal, Paleontology 1920s in paleontology Paleontology Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossi ... Paleontology 3 ...
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Archimyrmex
''Archimyrmex'' is an extinct genus of ant in the formicid subfamily Myrmeciinae, described by palaeoentomologist Theodore Cockerell in 1923. The genus contains four described species, ''Archimyrmex rostratus'', ''Archimyrmex piatnitzkyi'', ''Archimyrmex smekali'' and ''Archimyrmex wedmannae''. ''Archimyrmex'' is known from a group of Middle Eocene fossils which were found in North America, South America, and Europe. The genus was initially placed in the subfamily Ponerinae, but it was later placed in Myrmeciinae; it is now believed to be the ancestor of the extant primitive genus ''Myrmecia'' from Australia. Despite this, ''Archimyrmex'' is not a member to any tribe and is regarded as ''incertae sedis'' within Myrmeciinae. However, some authors believe ''Archimyrmex'' should be assigned as ''incertae sedis'' within Formicidae. These ants can be characterised by their large mandibles and body length, ranging from . They also have long, thin legs and an elongated mesosoma (thora ...
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